The topic of this blog is High Availability and Disaster Recovery (HA/DR).

What’s New?

Continuous Log Replay

Continuous log replay is a new mode for data replication. It significantly reduces network traffic and also reduces take-over time, when we switch form the primary to the secondary node. You configure continue log replay (as alternative to delta data shipping) when configuring the secondary site.

Storage Snapshots

Storage snaphost as backup to initialise system replication is now supported. Previously only data backups could be used. Using snapshots will be a time saver.

Proxy Schemas and Views

When system replication is activated on the secondary host, a proxy schema with monitoring views is populated with name _SYS_SR_SITE_<site_name>. SQL access to this schema can be used by monitoring tools to report on replication status. The schema is dropped again when the site is unregistered.

HA/DR Provider

A new hook has been added to the HA/DR provider: srConnectionChanged. These hooks can be used in host auto-failover and system replication takeover scripting, for example to switch virtual IP addresses, starting tools and applications on certain hosts after failover, or even stopping DEV or QA SAP HANA instances on secondary sites before takeover.

Thank you for watching

You can view more free online videos and hands-on use cases to help you answer the What, How and Why questions about SAP HANA and the SAP HANA Cloud Platform on the SAP HANA Academy at youtube.com/saphanaacademy.